Shyam went to grocery shop to purchase some food items. The shopkeeper packed all the item in polythene bags and gave them to Shyam. But, Shyam refused to accept the polythene bags and asked the shopkeeper to pack the items in paper bags. He informed the shopkeeper about the heavy penalty imposed by the government for using polythene bags. The shopkeeper promised that he would use paper bags in future in place of polythene bags.
Write one structural difference between low-density polythene and high-density polythene